Teledyne 2150 Operating instructions

2150 Area Velocity
Flow Module and Sensor
Installation and Operation Guide
Part #60-2003-092 of Assembly #60-2004-038
Copyright © 1999. All rights reserved, Teledyne Isco
Revision CE, November 2018

Radio Interference Statement
FCC
This equipment has been tested and found to comply with the limits for
a class A digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environ-
ment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which the user will be required to correct the
Canada
This ISM apparatus meets all requirements of the Canadian Interfer-
ence-Causing Equipment Regulations.
Ce générateur de fréquence radio ISM respecte toutes les exigences
du Règlement sur le materiel brouilleur du Canada.
Caution
Changes or modifications not expressly approved by the party
responsible for compliance (Teledyne Isco) could void your authority
to operate the equipment.
This equipment should be installed and operated using Isco’s cables,
such as the Flowlink Communication Cable or the optional Mod-
ule-to-module Cable. Isco cables are listed in Appendix B, Accessories.

Foreword
This instruction manual is designed to help you gain a thorough understanding of the operation of
the equipment. Teledyne ISCO recommends that you read this manual completely before placing
the equipment in service.
Although Teledyne ISCO designs reliability into all equipment, there is always the possibility of a
malfunction. This manual may help in diagnosing and repairing the malfunction.
If a problem persists, call or e-mail Teledyne ISCO technical support for assistance. Simple
difficulties can often be diagnosed over the phone. For faster service, please have your serial
number ready.
If it is necessary to return the equipment to the factory for service, please follow the shipping
instructions provided by technical support, including the use of the Return Material
Authorization (RMA) specified. Be sure to include a note describing the malfunction. This will
aid in the prompt repair and return of the equipment.
Teledyne ISCO welcomes suggestions that would improve the information presented in this
manual or enhance the operation of the equipment itself.
Teledyne ISCO is continually improving its products and reserves the right to change
product specifications, replacement parts, schematics, and instructions without notice.
Contact Information
Customer Service
Phone: [phone] (USA, Canada, Mexico)
[phone] (Outside North America)
Fax: [phone]
Email: [email protected]
Technical Support
Phone: Toll Free [phone] (Samplers and Flow Meters)
Toll Free [phone] (Syringe Pumps and Liquid Chromatography)
Email: [email protected]
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other Correspondence
Mail to: P.O. Box 82531, Lincoln, NE 68501-2531
Email: [email protected]
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.

2150 Area Velocity Module
Safety
iii
2150 Area Velocity Module
Safety
General Warnings Before installing, operating, or maintaining this equipment, it is
imperative that all hazards and preventive measures are fully
understood. While specific hazards may vary according to
location and application, take heed in the following general
warnings.
This product is often installed in confined spaces. Some examples
of confined spaces are manholes, pipelines, digesters, and storage
tanks. These spaces may become hazardous environments that
can prove fatal for those unprepared. These spaces are governed
governed by OSHA 1910.146 and require a permit before
entering.
Hazard Severity Levels This manual applies Hazard Severity Levels to the safety alerts,
These three levels are described in the sample alerts below.
CAUTION
Cautions identify a potential hazard, which if not avoided, may
result in minor or moderate injury. This category can also warn
you of unsafe practices, or conditions that may cause property
damage.
WARNING
Warnings identify a potentially hazardous condition, which
if not avoided, could result in death or serious injury.
DANGER
DANGER – limited to the most extreme situations
to identify an imminent hazard, which if not
avoided, will result in death or serious injury.

2150 Area Velocity Module
Safety
iv
Hazard Symbols The equipment and this manual use symbols used to warn of
hazards. The symbols are explained below.
Hazard Symbols
Warnings and Cautions
The exclamation point within the triangle is a warning sign alerting you of
important instructions in the instrument’s technical reference manual.
The lightning flash and arrowhead within the triangle is a warning sign alert-
ing you of “dangerous voltage” inside the product.
Symboles de sécurité
Ce symbole signale l’existence d’instructions importantes relatives au pro-
duit dans ce manuel.
Ce symbole signale la présence d’un danger d’électocution.
Warnungen und Vorsichtshinweise
Das Ausrufezeichen in Dreieck ist ein Warnzeichen, das Sie darauf
aufmerksam macht, daß wichtige Anleitungen zu diesem Handbuch
gehören.
Der gepfeilte Blitz im Dreieck ist ein Warnzeichen, das Sei vor “gefährlichen
Spannungen” im Inneren des Produkts warnt.
Advertencias y Precauciones
Esta señal le advierte sobre la importancia de las instrucciones del manual
que acompañan a este producto.
Esta señal alerta sobre la presencia de alto voltaje en el interior del
producto.

v
2150 Area Velocity Flow Module
Table of Contents
Section 1 Introduction
1.1 Product Description..................................................1-1
1.2 Applications ........................................................1-2
1.3 2150 System Overview ...............................................1-2
1.3.1 Level ........................................................1-2
1.3.2 Velocity ......................................................1-3
1.3.3 Flow Rate ....................................................1-3
1.3.4 Total Flow ....................................................1-3
1.3.5 Data Storage .................................................1-3
1.3.6 Input Voltage .................................................1-4
1.4 Component Identification .............................................1-5
1.4.1 Battery Module ...............................................1-6
1.5 Latches............................................................1-9
1.6 Communication Connectors ..........................................1-10
1.7 Connecting the Sensor ..............................................1-11
1.8 Installing the Batteries..............................................1-12
1.9 Stacking Modules ..................................................1-14
1.10 Technical Specifications ............................................1-17
Section 2 Preparation and Installation
2.1 Unpacking Instructions ..............................................2-1
2.2 Safety .............................................................2-2
2.2.1 Site Conditions ................................................2-2
2.2.2 System Power .................................................2-2
2.3 Preparing for Installation .............................................2-4
2.3.1 Locating the Site ..............................................2-4
2.3.2 Channels Without a Primary Device ..............................2-4
2.3.3 Channels With a Primary Device .................................2-4
2.3.4 AV Module and AV Sensor Mounting Considerations .................2-4
2.4 Installation Procedures...............................................2-5
2.4.1 Install Battery Module Batteries .................................2-5
2.4.2 Inspect the Desiccant – Battery Module ............................2-6
2.4.3 Inspect the Desiccant – AV Module ...............................2-6
2.4.4 Connecting the Modules ........................................2-6
2.4.5 Installing the modules ..........................................2-8
2.4.6 Connecting the AV Sensor .......................................2-9
2.4.7 Installing the AV Sensor .......................................2-10
2.4.8 Program the Module ..........................................2-11
2.4.9 Basic Installation Checklist ....................................2-12
2.5 Site Example ......................................................2-13
2.6 Mounting Rings ....................................................2-15
2.6.1 Spring Rings .................................................2-15
2.6.2 Scissors Mounting Ring ........................................2-17
2.6.3 Completing the AV Sensor Installation ...........................2-18

2150 Area Velocity Flow Module
Table of Contents
vi
Section 3 Programming
3.1 Section Overview ....................................................3-1
3.2 Flowlink Connections ................................................3-1
3.2.1 Communication Resolution ......................................3-2
3.3 Program Settings....................................................3-2
3.3.1 Level ........................................................3-3
3.3.2 Zero Level Offset ..............................................3-4
3.3.3 No Velocity Data and Flow Rates .................................3-5
3.3.4 Prevent Velocity Signal Interference ..............................3-5
3.3.5 Flow Conversion ...............................................3-6
3.3.6 Silt Level ....................................................3-7
3.3.7 Data Storage Rates ............................................3-7
3.3.8 Site Name ....................................................3-8
3.3.9 Module Name .................................................3-8
Section 4 Modbus Output Protocol
4.1 Introduction ........................................................4-1
4.2 Operation ..........................................................4-1
4.2.1 Establishing Communication ....................................4-2
4.2.2 Module Addressing ............................................4-2
4.3 Configurations ......................................................4-3
4.4 Glossary of Terms ...................................................4-4
4.5 Common Acronyms ..................................................4-5
4.6 Register Specifications ...............................................4-5
Section 5 Maintenance
5.1 Maintenance Overview ...............................................5-1
5.2 Maintenance Kits ...................................................5-1
5.3 Batteries...........................................................5-2
5.4 Desiccant ..........................................................5-2
5.4.1 Replacing the Desiccant: AV Module ..............................5-2
5.4.2 Replacing the Desiccant: Battery Module ..........................5-3
5.4.3 Reactivating the Desiccant ......................................5-3
5.5 Channel Conditions..................................................5-4
5.6 Other Maintenance ..................................................5-4
5.6.1 Hydrophobic Filter .............................................5-4
5.6.2 Cleaning .....................................................5-4
5.6.3 Sensor Cable Inspection ........................................5-5
5.7 How to Obtain Service ...............................................5-5
5.7.1 Diagnostics ...................................................5-5
Appendix A Replacement Parts
A.1 Replacement Parts Diagrams and Listings...............................A-1
Appendix B Accessories
B.1 How to Order.......................................................B-1
B.2 General Accessories .................................................B-1
B.3 Maintenance Kits ...................................................B-1
B.4 AV Sensor Mounting Accessories.......................................B-2
Appendix C Material Safety Data Sheets
C.1 Overview ..........................................................C-1

2150 Area Velocity Flow Module
Table of Contents
vii
Appendix D Safety Information
D.1 Safety Considerations ...............................................D-1
D.2 Practical Safety Precautions ..........................................D-1
D.2.1 Hazards .....................................................D-1
D.2.2 Planning ....................................................D-1
D.2.3 Adverse Atmospheres ..........................................D-2
D.2.4 Entering Manholes ............................................D-2
D.2.5 Traffic Protection .............................................D-3
D.2.6 Falling Objects ...............................................D-3
D.2.7 Removing the Covers ..........................................D-3
D.2.8 Other Precautions .............................................D-3
D.2.9 Emergencies .................................................D-3
D.2.10 Field Equipment .............................................D-3
D.3 Lethal Atmospheres in Sewers ........................................D-4
D.4 Hazardous Gases ...................................................D-6
List of Figures
1-1 Controls, connectors, and indicators – 2150 Flow Module ...................1-5
1-2 Battery Module components, top view ..................................1-6
1-3 Battery Module components, bottom view ...............................1-7
1-4 2150 Area Velocity Sensor Parts .......................................1-8
1-5 Unlocking the Latch .................................................1-9
1-6 Flow Module - Upper connector, capped ................................1-10
1-7 Flow Module - Upper connector, uncapped ..............................1-10
1-8 Flow Module - Lower connector, plugged ...............................1-10
1-9 Flow Module - Lower connector, unplugged .............................1-11
1-10 Flow Module - preparing the sensor connectors .........................1-11
1-11 Flow Module - connecting the sensor .................................1-11
1-12 Insert Battery in carrier ...........................................1-12
1-13 Battery Module - inserting carrier ...................................1-12
1-14 Battery Module - aligning the door ...................................1-13
1-15 Battery Module - closing the door ....................................1-13
1-16 Flow Module - Unlocking the latch ...................................1-14
1-17 Flow Module - Unplugging the connector ..............................1-14
1-18 Flow Module - Pushing plug into holder ...............................1-15
1-19 Battery Module - uncapping the connector .............................1-15
1-20 Battery Module - inserting the handle ................................1-16
1-21 Aligning the modules ..............................................1-16
1-22 Locking the modules ...............................................1-17
1-23 2150 Module Connector Pins ........................................1-20
2-1 Identifying the 2150 voltage specification ...............................2-3
2-2 Identifying the voltage specification on the DB9 cable .....................2-3
2-3 Installing a Battery .................................................2-6
2-4 Assembling a system (shown: 2 flow modules with 1 battery module) .........2-7
2-5 Connecting the AV Sensor ...........................................2-10
2-6 Typical Round-pipe Installation ......................................2-14
2-7 Sensor Installed on a Spring Ring ....................................2-15
2-8 Scissors Ring adjustment ...........................................2-18
3-1 Flowlink connections ................................................3-1
3-2 Preferred Measurement Location ......................................3-4
3-3 Zero Level Offset Measurement .......................................3-5
4-1 Configuration example ...............................................4-3

2150 Area Velocity Flow Module
Table of Contents
viii
List of Tables
1-1 Controls, connectors, and indicators – 2150 Flow Module ...................1-5
1-2 Battery Module Components - Top View ................................1-6
1-3 Battery Module Components - Bottom View .............................1-7
1-4 2150 Area Velocity Sensor Parts and Descriptions ........................1-8
1-5 Specifications – 2150 Area Velocity Flow Module ........................1-17
1-6 Specifications – 2150 Area Velocity Sensor .............................1-19
1-7 Specifications – 2191 Battery Module ..................................1-20
1-8 AV Module Connector Pins ..........................................1-20
2-1 Voltage Specifications for 2100 System Components .......................2-2
3-1 Flow Conversion Methods ............................................3-6
4-1 Modbus ASCII Address 1 Register Definitions ............................4-6
4-2 Modbus ASCII Address 2+(N-1) Register Definitions ......................4-6
4-3 2100 Measurement Parameters by Model Number* .......................4-8
D-1 Hazardous Gases ...................................................D-6

1-1
2150 Area Velocity Flow Module
Section 1 Introduction
1.1 Product Description The 2150 Area Velocity Module is part of Isco’s 2100 Series
system. The 2100 Series system measures parameters of open
channel flow streams.
The 2100 Series system is designed to be modular so that you can
expand the system to meet your data collection needs. By
stacking the 2100 Series modules, a single site can measure mul-
tiple flow channels, collect redundant data, or add other
available measurement capabilities. A site can include remote
measurement points, as distant as 3300 feet, by connecting
modules with cables. Even with several remote modules con-
figured as a site, you can still retrieve all of the measurement
data from a single connection.
The 2100 Series System is paired with Isco’s Flowlink software.
With this software application, you can quickly set up modules,
retrieve measurement data, manage the sites and analyze the
data.
The module’s data storage memory is quite flexible, able to store
the measurements in intervals from 15 seconds to 24 hours. The
modules can also be configured for variable rate data storage.
Variable rates allow you to store data at a different interval
when a programmed condition occurs.
The module’s program and collected data are stored in flash
memory for security. Flash memory retains data without the
concern of power failures or aging backup batteries. Its capacity
is more than sufficient for many applications. The data storage
memory can hold approximately 79,000 readings – the equiv-
alent of nine months of level and velocity data when stored at
fifteen minute intervals. The flash memory also stores sensor cal-
ibration information. A separate flash memory device inside the
module stores the operating firmware.
The rugged 2100 series components are rated NEMA 4X, 6P
(IP68). The permanently sealed enclosures are designed to meet
the environmental demands of many sewer flow monitoring
applications. All connections between modules, sensors, and com-
munication cables “lock” in place. Each locking mechanism
strongly secures the components and ensures a watertight seal.
The flow information from a 2150 can be used to pace an Isco
3700, GLS, or 6700 Series sampler. The connection is made using
a 2100 Series Sampler Interface Cable (Isco part #68-2000-014).
A flow pulse is sent out every 100 gallons or 500 liters of flow,
depending on how the 2150 is configured.
A 3-module site

2150 Area Velocity Flow Module
Section 1 Introduction
1-2
1.2 Applications Typical applications for the 2150 Module include:
• Portable and permanent on-site flow monitoring for
inflow and infiltration (I&I), capacity assessment,
combined sewer overflow (CSO), and other sewer studies
• Storm Water Runoff Monitoring
• Shallow flow measurement in small pipes.
1.3 2150 System Overview The 2150 measures liquid level and average stream velocity, and
calculates the flow rate and total flow. The liquid level and
velocity measurements are read from an attached AV Sensor that
is placed in the flow stream. Flow rate calculations are per-
formed internally using the measured parameters from the AV
Sensor. Additionally, the AV Module can measure its input
voltage – a service feature.
The 2150 is designed to provide durable operation with only a
minimal amount of routine maintenance, all of which may be
performed in the field. Typically, the AV Module and its AV
Sensor will only require that you keep the stream free from
excessive debris, and replace or recharge spent desiccant and
batteries.
Sections 1.3.1 through 1.3.6 describe the module and sensor in
greater detail.
1.3.1 Level The AV Sensor’s internal differential pressure transducer mea-
sures the liquid level. The transducer is a small piezo-resistive
chip that detects the difference of the pressures felt on the inner
and outer face.
The stainless steel outer diaphragm is exposed to the flow stream
through the ports under the AV Sensor. The pressure felt on the
outer diaphragm is transferred to the outer face of the trans-
ducer through a silicone fluid medium. The outer diaphragm and
fluid isolate the sensitive transducer from direct exposure to the
stream. The inner face of the transducer is exposed, or refer-
enced, to the atmosphere through the internal vent tube that
runs the full length of the AV Sensor’s cable.
The difference between the pressures exerted on the transducer
is the hydrostatic pressure. Hydrostatic pressure is proportional
to the level of the stream. The analog representation of the
hydrostatic pressure is digitized and sent to the AV Module as an
RS-485 half-duplex signal.
AV Module
AV Sensor
reference to
atmosphere
silicone
fluid
outer
diaphragm
piezo-
resistive
transducer

2150 Area Velocity Flow Module
Section 1 Introduction
1-3
1.3.2 Velocity The AV Sensor measures average velocity by using ultrasonic
sound waves and the Doppler effect. The Doppler effect states
that the frequency of a sound wave (or other wave) passed from
one body to another is relative to both their motions. As the two
approach each other, the frequency increases; as they move
apart, the frequency decreases.
The AV Sensor contains a pair of ultrasonic transducers. One
transducer transmits the ultrasonic sound wave. As the trans-
mitted wave travels through the stream, particles and bubbles
carried by the stream reflect the sound wave back towards the
AV Sensor. The second transducer receives the reflected wave.
Circuits internal to the module compare the frequencies of the
sound waves and extract the difference. An increase or decrease
in the frequency of the reflected wave indicates forward or
reverse flow. The degree of change is proportional to the velocity
of the flow stream.
1.3.3 Flow Rate Using measurements from the AV Sensor, the AV Module can
calculate the flow rate. The AV Module supports many different
flow rate conversion methods:
• Area Velocity
• Data Points
• Manning Formula
• Two-term Polynomial Equations
• Flumes
• Weirs
Often the Model 2150 Area Velocity Flow Module is chosen for
applications where a primary device is not available, nor is it
practical to install a primary device. Therefore, area velocity is
usually the conversion method of choice.
The AV Module is capable of calculating and storing any two con-
version methods simultaneously. This feature is useful when it is
necessary to validate a flow conversion method. For example, the
flow rate at a new site programmed for area velocity conversion
can be directly compared to the flow rate calculated using a
Manning formula.
1.3.4 Total Flow The AV Module can calculate and report the total flow. You can
set up the module to monitor net, positive, or negative total flow
from either of the calculated flow rates.
1.3.5 Data Storage Through Flowlink, you configure which type of data is logged and
the storage rate. For each measurement, the Data Storage Setup
window lets you turn the primary rate off, or select a rate from 15
seconds to once every 24 hours. If the primary rate is turned off,
the AV Module will not store the measurement (unless a sec-
ondary rate is selected). However, the AV Module will still take
readings if that measurement type is necessary for a calculation.
Particles or
air bubbles
Ultrasonic
sound waves
Flow

2150 Area Velocity Flow Module
Section 1 Introduction
1-4
Secondary rates are used to log data at a different rate when a
user-defined condition exists. For example, a secondary rate can
be used to increase the level and velocity data storage rate when
level is greater than or equal to a point of interest. Secondary
rates give you the best resolution of data, but only when it is
needed. Until the condition is met, the module will conserve
power and memory by storing the data at the primary storage
rate. Like the primary rate, you can turn the secondary rate off,
or select a storage rate of 15 seconds to every 24 hours.
Time Resolution The time resolution of each measurement is one second. That is,
readings are taken at the same time as the time stamp, not col-
lected and averaged over a period of time before the stamp.
Rollover Memory Whether the measurements are stored at the primary or sec-
ondary rate, they are stored in a rollover type of memory. When
full, the module overwrites the oldest data with the newest
readings.
1.3.6 Input Voltage The AV Module measures the input voltage so that it can be
reported to the user. Input Voltage measurements are useful
when estimating the remaining battery life and determining
when the system must be serviced. You can log the Input Voltage
readings in data storage to chart power consumption.
2191 Battery Module The Battery Module uses two 6 volt lantern batteries to supply
12VDC to Model 2100 system modules.
The Battery Module’s only role is to supply DC power, yet it still
supports communications between other modules. The upper and
lower connectors pass along communications between modules
attached above and below.
You can stack Battery Modules to increase the power available to
a module or a stack of modules.

2150 Area Velocity Flow Module
Section 1 Introduction
1-5
1.4 Component
Identification
The components of the 2150 Module, area velocity sensor, and
2191 Battery Module are shown in Figures 1-2 through 1-3.
Items referenced in the figures are briefly discussed in the tables
below.
Figure 1-1 Controls, connectors, and indicators – 2150 Flow Module
Top/Right View
Bottom/Left View
12
3
7
9
54
8
6
10
11
Table 1-1 Controls, connectors, and indicators – 2150 Flow Module
Item No. Name Description
1 Communication
Connector
Upper communication port. The connection transfers data and 12 VDC power to
other modules. The port is also used to connect to a PC running Flowlink software.
2 Connector Caps Insert into unused communication connectors to terminate the network and protect
them from moisture damage. When communication connectors are in use, the
caps must be stowed as shown in Figure 1-1 to protect the terminating components
inside the caps.
3 Communication
Indicator
Illuminates when the module is active. With Flowlink, a user can turn on this
light-emitting diode (LED) to identify the module at a multiple-module site.
4 Latch Release Push in to release the module from a stack.
5 Sensor Receptacle Port used to attach the AV Sensor. Insert the protective cap when not in use.
6 Hydrophobic Filter Prevents moisture from entering the case and reference line.
7 Desiccant Cartridge Container holding desiccant that dries the reference air.
8 Latch Push in to lock the module in a stack.
9 Serial Number Label On back of unit - lists product ID and unit serial numbers.
10 Communication
Connector
Lower communication port. The connector transfers data and 12 VDC power to
other modules.
11 Connector Plug Insert into the interface connector when the connector is not in use to protect it
from damage.

2150 Area Velocity Flow Module
Section 1 Introduction
1-6
1.4.1 Battery Module Figures 1-2 and 1-3 identify key components of the model 2191
Battery Module.
Figure 1-2 Battery Module components, top view
4
5
67
2
1
3
Table 1-2 Battery Module Components - Top View
Item No. Description
1 Communication Connector
2 Connector Cap
3 Connector Cap Holder
4 Lantern Battery (Alkaline shown)
5 Door
6 Battery Carrier
7 Latch Release

2150 Area Velocity Flow Module
Section 1 Introduction
1-7
Figure 1-3 Battery Module components, bottom view
4
2
1
3
Table 1-3 Battery Module Components - Bottom View
Item No.
Fig. 1-3 Description
1 Communication connector
2 Connector plug
3 Connector plug holder
4 Latch

2150 Area Velocity Flow Module
Section 1 Introduction
1-8
Figure 1-4 2150 Area Velocity Sensor Parts
123 4
5
Table 1-4 2150 Area Velocity Sensor Parts and Descriptions
Item No.
Fig. 1-4 Name Description
1 Connector Cap Protects the connector. When the connector is not in use, this cap must be in
place to prevent damage to the connector pins and reference air tubing.
2 Connector Attaches to the sensor receptacle on the 2150.
3 Serial Number Label Lists product ID and unit serial numbers.
4 Cable 394 in (10 m) cable containing the reference air tubing and conductors to
transfer level data, velocity data, and AV Sensor power.
5 Sensor Body The sensor body is placed in the flow stream to measure level and velocity.